October 31 is a day that has significant events in Maryland history. Here are five interesting facts about this particular date:

1. 1731: The city of Baltimore was founded.

In 1731, the Maryland General Assembly passed an act to create a town called Baltimore in Baltimore County. The town was named after Lord Baltimore, the founder of Maryland. It would eventually become one of the largest cities in the United States.

2. 1864: The Battle of Back River was fought.

During the American Civil War, the Battle of Back River took place in Baltimore County on October 31, 1864. The Union forces, led by Major General Benjamin Butler, were trying to cut off Confederate supply lines. Despite heavy fighting, the Confederate forces were able to push back the Union troops.

3. 1935: The Chesapeake Bay Bridge was opened.

The Chesapeake Bay Bridge, which connects the Eastern and Western shores of Maryland, was officially opened on October 31, 1935. At the time, it was the longest over-water bridge in the world. It is still an important transportation link for the region today.

4. 1950: The first National Jaycees haunted house was held in Maryland.

The Junior Chamber of Commerce (Jaycees) held the first National Jaycees haunted house in Baltimore, Maryland, on October 31, 1950. This event would become an annual tradition for the organization, and would spread to other cities across the United States.

5. 2000: The Baltimore Orioles won the World Series.

On October 31, 2000, the Baltimore Orioles won their third World Series championship by defeating the New York Mets in five games. The series was notable for its exciting finishes, including a walk-off home run by Oriole Tony Batista in Game 1.